WHAT IT IS: Dr. Barbara Sturm's awardwinning HYALURONIC SERUM - clinically proven to visibly slow skin aging and deliver lasting hydration.* *CLINICAL TEST OF 56 DAYS. For Dr. Barbara Sturm, skin aging is associated with biological aging, including the appearance of fine lines and wrinkles, loss of elasticity and vitality, dehydrated skin, and dullness. KEY BENEFITS: Activates the skin's three key youth factors Hyaluronic Acid, Collagen, and Elastin, for improved: Hydration: Activates skin's nat